Description 
BOSMA's Seal is a self-adhesive polymer modified bitumen adhesive tape backed with a durable aluminium foil that creates a watertight seal on almost any surface. It is ready to use and ideal for sealing and repairing of metal sheeting, water tanks, down pipes and gutters. It is supplied in rolls that are interleaved with a disposable release film.

Features & Benefits
Instant water-tight seal - impermeable to moisture and water vapour
Quick effective repairs
Excellent resistance to weathering
Durable, remaining permanently flexible
Strong aluminium foil backing

Applications
Sealing and repairing of holes, gaps and overlaps in galvanized roof sheeting, valley gutters, down pipes, roof screws, flashings, parapets, window frames, pipe vents, ridging, metal boxes, galvanized buckets, water tanks, sheds and kennels.

Adhesion
Steel, aluminium, metals, concrete, stone, bricks, cement plaster, polycarbonate, PVC, glass, and wood.

Limitations
Not suited for polypropylene, polyethylene and Teflon.
Not suitable for sealing of high-pressure systems.

Safety instructions
BOSMA's Seal is non-toxic, however, it is advisable to wear gloves in order to avoid direct skin contact. If the product comes in contact with skin or eyes, flush thoroughly and immediately with water. If irritation continues, seek medical attention. Keep out of reach of children! Refer to our Safety Data Sheet for further toxicological information and comprehensive handling instructions.

Surface preparation

Surfaces to be bonded must be clean, structurally sound, dry and free from dust, dirt, oil, rust and loose material.Smooth non-porous surfaces such as metals and plastics should degreased with a solvent such as acetone or thinners. Any gaps should be filled prior to application. Poor surface preparation may result in lifting and delamination of the tape.

Directions for use

Ensure that surfaces are prepared as above.

Unroll the tape and measure the correct length for the area to be sealed.

Cut the tape ensuring a 40mm overlap.

Allow the tape to warm in the sun before application.

Peel the release paper back from one end and press the tape firmly onto the surface.

Removing the backing tape as you proceed.

On angles and grooves press firmly into the angle or groove first.

For a smooth finish, press tape with a rubber hand roller, working from the center outwards, remove any air bubbles and creases ensuring firm contact is made with the surface.

The aluminium foil backing must not be removed.

Storage stability

Store in cool place below 25°C. Recommended storage is 24 months.

Product Data

i. Physical data

TypePolymer modified bitumen adhesiveAppearanceBlack Bitumen with aluminum reflective coveringThickness1.0mm,1.2mm,1.5mm,2.0mmMelting Point90°C

ii. Application data

Recommend Application Temperature +15 to 45°C

iii. Performance data

Maximum Load(Tensile strength)ASTM D2523-13Longitudinal:5.1kN/m
Transverse:4.5kN/mElongation ar BreakASTM D2523-13Longitudinal:104%
Transverse:90%Adhesion to PlywoodASTM D903-98(2017)At 4°C: 19.3kgf/30.5cm
At 23°C: 22.4kgf/30.5cmTear ResistanceASTM D4073-06Longitudinal:209N
Transverse:218NThermal StabilityASTM D1204-14Flexibility TemperatureASTM D1970No cracks at -29°CMoisture Vapor PermeabilityASTM E96/E96M-151.6ng/Pa.s.(square meter)Seal Ability Around NailASTM D1970 Section 7.9ExcellentWaterproof Integrity of LapASTM D1970 Section 7.10No water seepage was found